Handle double faults

src/interrupts.rs

@@ -6,6 +6,7 @@ lazy_static! {
     static ref IDT: InterruptDescriptorTable = {
         let mut idt = InterruptDescriptorTable::new();
         idt.breakpoint.set_handler_fn(breakpoint_handler);
+        idt.double_fault.set_handler_fn(double_fault_handler);
         idt
     };
 }
@@ -17,3 +18,7 @@ pub fn init_idt() {
 extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) {
     println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
 }
+
+extern "x86-interrupt" fn double_fault_handler(stack_frame: InterruptStackFrame, _error_code: u64) -> ! {
+    panic!("EXCEPTION : DOUBLE FAULT\n{:#?}", stack_frame);
+}

src/main.rs

@@ -30,6 +30,10 @@ pub extern "C" fn _start() {
 
     x86_64::instructions::interrupts::int3();
 
+    unsafe {
+        *(0xdeadbeef as *mut u64) = 42;
+    }
+
     #[cfg(test)]
     test_main();